WO2023125033A1 - Procédé d'obtention (ou de fourniture) d'informations de synchronisation d'horloge et dispositif de communication - Google Patents

Procédé d'obtention (ou de fourniture) d'informations de synchronisation d'horloge et dispositif de communication Download PDF

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Publication number
WO2023125033A1
WO2023125033A1 PCT/CN2022/139228 CN2022139228W WO2023125033A1 WO 2023125033 A1 WO2023125033 A1 WO 2023125033A1 CN 2022139228 W CN2022139228 W CN 2022139228W WO 2023125033 A1 WO2023125033 A1 WO 2023125033A1
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WIPO (PCT)
Prior art keywords
wireless device
clock synchronization
clock
synchronization accuracy
device controller
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PCT/CN2022/139228
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English (en)
Chinese (zh)
Inventor
韩希
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华为技术有限公司
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Priority to KR1020247011442A priority Critical patent/KR20240052848A/ko
Publication of WO2023125033A1 publication Critical patent/WO2023125033A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/12—Electrically-operated arrangements for indicating correct tuning
    • H03J3/14—Visual indication, e.g. magic eye

Definitions

  • the embodiments of the present application relate to the communication field, and in particular to a method for acquiring (or providing) clock synchronization information and a communication device.
  • the wireless device controller communicates with the wireless device through the fronthaul interface.
  • the wireless device controller can obtain the clock of the wireless device relative to the wireless device controller synchronization accuracy.
  • the wireless device controller can determine whether a certain service can be coordinated based on the clock synchronization accuracy of each wireless device.
  • the wireless device controller and the wireless device in the fronthaul network are not necessarily directly connected.
  • the wireless device controller may be connected to the wireless device through one or more transmission devices.
  • the wireless device controller cannot know the clock synchronization basis of the wireless device. Therefore, it may affect the wireless device controller to decide whether the wireless device runs a certain service.
  • the present application provides a method for acquiring (or providing) clock synchronization information and a communication device, which are used to enable the wireless device controller to know the clock synchronization accuracy of the wireless device relative to the wireless device controller, which is beneficial for the wireless device controller to decide whether to Trigger a certain service of the wireless device.
  • the present application provides a method for acquiring clock synchronization information, and the method involves a wireless device controller and a wireless device.
  • the wireless device controller can receive clock synchronization information from the wireless device, and the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source. Then, the wireless device controller can determine a first clock synchronization accuracy according to the clock synchronization information, where the first clock synchronization accuracy is a clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock synchronization accuracy refers to the fluctuation range of the difference between the time (or phase) of the measured clock and the time (or phase) of the reference clock. Generally, it can be represented by the time (or phase) error mean value of the clock under test and the reference clock within a period of test measurement.
  • the clock synchronization accuracy refers to the fluctuation range of the time or phase difference between a wireless device and a certain transmission device or a certain wireless device controller. It should be noted that in some embodiments, the foregoing clock synchronization accuracy may also be referred to as synchronization accuracy or time synchronization accuracy.
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source. It can be understood that the clock synchronization information is information used to determine the clock synchronization accuracy between the wireless device and the clock source.
  • the wireless device The controller can determine the clock synchronization accuracy between the wireless device and the clock source based on the aforementioned clock synchronization information.
  • the clock source is a network device that provides a clock reference for a clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the clock reference is the final reference basis for clock synchronization or clock calibration.
  • the wireless device controller cannot know which clock synchronization link the wireless device is based on, nor can it know which network device is the clock source on the clock link on which the wireless device performs clock synchronization. Therefore, the wireless device controller cannot know the clock synchronization accuracy of the wireless device relative to the wireless device controller, and further, the wireless device controller cannot manage some services of the wireless device based on the clock synchronization accuracy.
  • the wireless device controller can determine the relative accuracy of the wireless device to the wireless device based on the aforementioned clock synchronization information
  • the clock synchronization accuracy of the device controller (ie, the first clock synchronization accuracy) is therefore beneficial for the wireless device controller to manage the wireless device based on the first clock synchronization accuracy.
  • the wireless device may be connected to the wireless device controller through at least one clock information transmission device, or the wireless device may be directly connected to the wireless device controller.
  • the clock information transmission device refers to a device for transmitting information related to clock synchronization (hereinafter referred to as clock information), and the clock information may include part or all of the aforementioned clock synchronization information.
  • clock information information related to clock synchronization
  • the aforementioned at least one clock information transmission device is connected.
  • the wireless device controller can receive the aforementioned clock synchronization information from the wireless device.
  • the clock synchronization information includes an identifier of the clock source and an identifier of a source port; where the identifier of the source port is used to indicate that the last clock synchronization provider in the clock link that provided clock synchronization to the wireless device level network equipment.
  • the identifier of the clock source is used to indicate the network device that provides the clock reference for the clock link where the wireless device is located.
  • the clock source is a network device that provides a clock reference reference for the clock link where the wireless device is located, and the clock reference reference is the final reference basis for clock synchronization or clock calibration. All devices (including transmission devices and wireless devices) on the clock link directly or indirectly use the system clock of the clock source as a reference for clock synchronization.
  • the clock link is a link between the clock source and the wireless device for clock synchronization.
  • the clock source in the clock synchronization information sent by the wireless device to the wireless device controller may be the wireless device controller that received the aforementioned clock synchronization information.
  • the wireless device and the wireless device controller are located on the same clock On the synchronization link; it may also be the wireless device controller on other clock links.
  • the wireless device may be clock-synchronized through another clock link, and the clock link does not include the aforementioned received clock synchronization information
  • the wireless device controller it may also be a network device on other links or topologies that can provide a clock as a reference, which is not specifically limited here.
  • the identifier of the source port is used to indicate an upper-level network device that provides clock synchronization to the wireless device in the clock link, wherein the upper-level network device is a network device directly connected to the wireless device, and, The wireless device performs clock synchronization directly based on the network device.
  • the upper-level network device may be a transmission device connected to the wireless device, or may be a wireless device controller.
  • the clock synchronization information further includes a second clock synchronization accuracy, where the second clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the upper-level network device.
  • the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the upper-level network device, that is, the time (or phase) of the system clock of the wireless device and the time of the system clock of the upper-level network device (or phase) fluctuation range of the difference between.
  • the second clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the transmission device; if the upper-level network device If it is a wireless device controller directly connected to the wireless device, the second clock synchronization accuracy is a clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock synchronization information further includes an identifier of the wireless device, and the identifier of the wireless device is used to clearly send the identity of the wireless device that sends the clock synchronization information to the wireless device controller, so that the wireless device controller The identifier of can determine which wireless device the clock synchronization information comes from.
  • the identification of the wireless devices enables the wireless device sending the clock synchronization information to be distinguished from other wireless devices.
  • the wireless device controller determines the first clock synchronization precision according to the clock synchronization information.
  • the specific process may be: when the identifier of the clock source is the same as the identifier of the wireless device controller, and the identifier of the clock source is the same as the identifier of the source port, the wireless device controller determines that the second clock synchronization accuracy is The first clock synchronization accuracy.
  • the identifier of the clock source is the same as the identifier of the wireless device controller, and the identifier of the clock source is the same as the identifier of the source port, therefore, the wireless device controller can determine that the wireless device and the wireless device The controller is directly connected, that is, the wireless device performs clock synchronization directly based on the clock source. Further, the wireless device controller can determine that the second clock synchronization accuracy carried in the clock synchronization information represents the clock synchronization accuracy (that is, the first clock synchronization accuracy) of the wireless device relative to the wireless device controller. Therefore, the wireless device controller uses the value of the second clock synchronization precision in the clock synchronization information as the value of the first clock synchronization precision.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the clock information refers to information related to clock synchronization
  • the content of the clock information may include part or all of the content of the aforementioned clock synchronization information.
  • the wireless device controller determines according to the clock synchronization information
  • the specific process of the first clock synchronization accuracy includes: when the identifier of the clock source is the same as the identifier of the wireless device controller, and the identifier of the clock source is different from the identifier of the source port, the wireless device controller according to the The quantity information of the communication channels, the second clock synchronization accuracy and the preset clock synchronization accuracy determine the first clock synchronization accuracy.
  • the identifier of the clock source is different from the identifier of the source port, which means that the upper-level network device of the wireless device is not the same device as the clock source, and the wireless device is connected to the clock source through at least one transmission device.
  • the foregoing at least one transmission device includes an upper-level network device of the foregoing wireless device.
  • the aforementioned second clock synchronization accuracy indicates the clock synchronization accuracy of the wireless device with respect to the upper-level network device that provides clock synchronization to the wireless device, but the second clock synchronization accuracy cannot reflect the clock synchronization accuracy of the wireless device with respect to the clock source. clock synchronization accuracy.
  • the wireless device controller needs to determine the topology of the clock link between the wireless device and the wireless device controller in combination with the information on the number of communication channels, and then estimate the relationship between the wireless device and the second clock synchronization accuracy based on the preset clock synchronization accuracy and the second clock synchronization accuracy.
  • the clock synchronization accuracy between wireless device controllers that is, the first clock synchronization accuracy.
  • the wireless device controller determines the first clock synchronization accuracy according to the quantity information of the communication channel, the second clock synchronization accuracy, and the preset clock synchronization accuracy, including: the wireless device controller determining the A product obtained by multiplying the difference between the number of communication channels and 1 by a preset clock synchronization precision; the wireless device controller determines that the sum of the product and the second clock synchronization precision is the first clock synchronization precision.
  • the preset clock synchronization accuracy may be the clock synchronization accuracy between two network devices predefined in the protocol or standard, or it may be an empirical value artificially set in the wireless device controller, indicating that the two network devices in the clock link Possible values for the precision of clock synchronization between network devices. It should be understood that, in addition to estimating the clock synchronization accuracy between two transmission devices, the preset clock synchronization accuracy can also be used to estimate the relationship between the transmission device and the wireless device controller directly connected to the transmission device. Clock synchronization accuracy.
  • the wireless device controller can estimate the clock synchronization accuracy between two network devices connected by each communication channel ( Hereinafter referred to as clock synchronization accuracy at all levels), the wireless device controller can use the cumulative sum of the synchronization accuracy of clock synchronization at all levels as the clock synchronization accuracy between the wireless device and the wireless device controller (that is, the first clock synchronization accuracy ).
  • the second clock synchronization accuracy can determine the wireless The clock synchronization accuracy of the device relative to the upper-level network device of the wireless device. Therefore, the wireless device controller can use the product obtained by multiplying the difference between the number of communication channels and 1 by the preset clock synchronization accuracy as the wireless The clock synchronization accuracy between the device's upper-level network device and the wireless device controller. Then, the wireless device controller calculates the sum of the aforementioned product and the second clock synchronization precision as the first clock synchronization precision.
  • the wireless device controller can calculate the number of communication channels between the wireless device and the wireless device controller.
  • the topological structure of the clock link between the devices, and then the first clock synchronization accuracy is determined based on the topology structure of the clock link, the preset clock synchronization accuracy and the second clock synchronization accuracy.
  • this embodiment is beneficial to ensure the accuracy of the wireless device controller when estimating the first clock synchronization accuracy, and further It is beneficial for the wireless device controller to make more accurate and reasonable decisions regarding the services of the wireless device.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy; where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • the clock synchronization information further includes an identifier of the wireless device, and the identifier of the wireless device is used to clearly send the identity of the wireless device that sends the clock synchronization information to the wireless device controller, so that the wireless device controller The identifier of can determine which wireless device the clock synchronization information comes from.
  • the identification of the wireless device enables the wireless device sending the clock synchronization information to be distinguished from other wireless devices.
  • the wireless device controller determining the first clock synchronization accuracy according to the clock synchronization information includes: when the identifier of the clock source is the same as the identifier of the wireless device controller, the wireless device controller Determine the third clock synchronization accuracy as the first clock synchronization accuracy.
  • the wireless device may provide the wireless device controller with the aforementioned third clock synchronization accuracy if the wireless device can obtain the clock synchronization accuracy (that is, the third clock synchronization accuracy) of the wireless device relative to the clock source from the fronthaul network.
  • the wireless device may provide the wireless device controller with the aforementioned third clock synchronization accuracy if the clock source is a wireless device controller receiving the clock synchronization signal.
  • the value of the third clock synchronization accuracy represents the clock synchronization accuracy of the wireless device relative to the wireless device controller (ie, the first clock synchronization accuracy). Therefore, when the identifier of the clock source is the same as the identifier of the wireless device controller, the wireless device controller determines that the third clock synchronization accuracy is the first clock synchronization accuracy.
  • the clock synchronization information is carried in a management message.
  • the management message may be a management message for clock management between the wireless device and the wireless device controller, or a management message for managing other services or functions between the wireless device and the wireless device controller, which is not limited here. . Since the management message can realize point-to-point transmission from the wireless device to the wireless device controller, the clock synchronization information is carried in the management message, which is conducive to realizing accurate information transmission, avoiding signaling storms, and facilitating Reduce the transmission load of the network.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the foregoing clock synchronization information may be carried in a message that the wireless device can directly send to the wireless device controller in a unicast manner.
  • the wireless device may send the foregoing clock synchronization information to the wireless device controller in a manner of unicasting an Internet protocol (internet protocol, IP) message.
  • IP Internet protocol
  • the method further includes: the wireless device controller sending the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device.
  • the wireless device controller may only send the clock synchronization information of the wireless device to the network management device, or may only send the first clock synchronization accuracy to the network management device, or may combine the aforementioned clock synchronization information and the first clock synchronization accuracy are sent to the aforementioned network management device. Therefore, the network management device may determine the clock link between the aforementioned wireless device and the wireless device controller based on the aforementioned clock synchronization information. If the network management device receives the clock synchronization information of multiple wireless devices, the network management device can determine the clock topology formed by multiple clock links.
  • the network management device it is beneficial for the network management device to manage the transmission devices in the fronthaul network or the wireless devices and wireless device controllers linked through the aforementioned fronthaul network based on the aforementioned clock link (or clock topology), which is conducive to improving network device management of transmission devices, Management efficiency of wireless devices or wireless device controllers.
  • the wireless device includes a first wireless device and a second wireless device, and if the wireless device controller determines a fourth clock synchronization accuracy according to clock synchronization information received from the first wireless device, the fourth The clock synchronization accuracy is the clock synchronization accuracy between the first wireless device and the wireless device controller, and the wireless device controller determines a fifth clock synchronization accuracy according to the clock synchronization information received from the second wireless device, the first The fifth clock synchronization accuracy is the clock synchronization accuracy between the second wireless device and the wireless device controller, and thereafter, the method further includes:
  • the wireless device controller determines a sixth clock synchronization accuracy according to the fourth clock synchronization accuracy and the fifth clock synchronization accuracy, and the sixth clock synchronization accuracy is the clock synchronization between the first wireless device and the second wireless device precision;
  • the wireless device controller determines whether to allow the first wireless device to cooperate with the second wireless device to run a first service according to the sixth clock synchronization accuracy, and the first service is a service that requires two or more wireless devices to perform coordinated operations .
  • the first service may be a service involving multiple-input multiple-output technology (multiple-input multiple-output, MIMO), or a service involving carrier aggregation (carrier aggregation, CA), etc., which is not limited in this application .
  • MIMO multiple-input multiple-output technology
  • CA carrier aggregation
  • the wireless device controller determines the sixth clock synchronization accuracy according to the fourth clock synchronization accuracy and the fifth clock synchronization accuracy, specifically, the wireless device controller calculates the fourth clock synchronization accuracy The sum of the clock synchronization accuracy and the fifth clock synchronization accuracy obtains the sixth clock synchronization accuracy.
  • the wireless device controller determines whether to allow the first wireless device to cooperate with the second wireless device to run the first service according to the sixth clock synchronization accuracy, which may specifically be:
  • the wireless device controller determines to allow the first wireless device to cooperate with the second wireless device to run the first service
  • the wireless device controller determines that the first wireless device is not allowed to cooperate with the second wireless device to run the first service.
  • the clock synchronization accuracy corresponding to the first service can be understood as the maximum time (or phase) deviation that the first service can tolerate.
  • the clock synchronization accuracy between certain two wireless devices is less than the clock synchronization accuracy corresponding to the first service, it can be understood that the time (or phase) deviation of the two wireless devices will not affect the operation of the aforementioned first service ;
  • the clock synchronization accuracy between two wireless devices is greater than the clock synchronization accuracy corresponding to the first service, it can be understood that the time (or phase) deviation of the two wireless devices is relatively large, and there is a greater possibility of Therefore, in this case, it is not suggested that the first wireless device and the second wireless device cooperate to run the first service.
  • the present application provides a method for providing clock synchronization accuracy, and the method involves a wireless device controller and a wireless device.
  • the wireless device sends clock synchronization information to the wireless device controller
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source
  • the clock synchronization information is used to determine a first clock synchronization accuracy
  • the first The clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock synchronization accuracy refers to the fluctuation range of the difference between the time (or phase) of the measured clock and the time (or phase) of the reference clock. Generally, it can be represented by the time (or phase) error mean value of the clock under test and the reference clock within a period of test measurement.
  • the clock synchronization accuracy refers to the fluctuation range of the time or phase difference between a wireless device and a certain transmission device or a certain wireless device controller. It should be noted that in some embodiments, the foregoing clock synchronization accuracy may also be referred to as synchronization accuracy or time synchronization accuracy.
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source. It can be understood that the clock synchronization information is information used to determine the clock synchronization accuracy between the wireless device and the clock source.
  • the wireless device The controller can determine the clock synchronization accuracy between the wireless device and the clock source based on the aforementioned clock synchronization information.
  • the clock source is a network device that provides a clock reference for a clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the clock reference is the final reference basis for clock synchronization or clock calibration.
  • the wireless device can provide the wireless controller with the clock synchronization accuracy of the wireless device relative to the clock source through the clock synchronization information, and then the wireless device controller can determine the relative
  • the clock synchronization accuracy of the device controller (ie, the first clock synchronization accuracy) is therefore beneficial for the wireless device controller to manage the wireless device based on the first clock synchronization accuracy. Furthermore, it is beneficial for the wireless device controller to accurately determine the clock synchronization precision between the two wireless devices. Furthermore, it is beneficial for the wireless device controller to decide whether the aforementioned two wireless devices run a certain service that requires coordinated operation.
  • the wireless device may be connected to the wireless device controller through at least one clock information transmission device, or the wireless device may be directly connected to the wireless device controller.
  • the clock synchronization information includes an identifier of the clock source and an identifier of a source port; where the identifier of the source port is used to indicate that the last clock synchronization provider in the clock link that provided clock synchronization to the wireless device level network equipment.
  • the identifier of the source port is used to indicate an upper-level network device that provides clock synchronization to the wireless device in the clock link, wherein the upper-level network device is a network device directly connected to the wireless device, and, The wireless device performs clock synchronization directly based on the network device.
  • the upper-level network device may be a transmission device connected to the wireless device, or may be a wireless device controller.
  • the clock synchronization information further includes a second clock synchronization accuracy, where the second clock synchronization accuracy is a clock synchronization accuracy of the wireless device with respect to the upper-level network device of the wireless device.
  • the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the upper-level network device, that is, the time (or phase) of the system clock of the wireless device and the time of the system clock of the upper-level network device (or phase) fluctuation range of the difference between.
  • the second clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the transmission device; if the upper-level network device If it is a wireless device controller directly connected to the wireless device, the second clock synchronization accuracy is a clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two devices capable of transmitting clock information.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy; where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • the clock synchronization information is carried in a management message.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the clock synchronization information further includes an identifier of the wireless device, and the identifier of the wireless device is used to explicitly send the identity of the wireless device that sends the clock synchronization information to the wireless device controller, so that the wireless device controller The device can determine which wireless device the clock synchronization information is from based on the identification of the wireless device.
  • the identification of the wireless devices enables the wireless device sending the clock synchronization information to be distinguished from other wireless devices.
  • the present application provides a wireless device controller, where the wireless device controller includes a transceiver module and a processing module.
  • the transceiver module is used to receive clock synchronization information from the wireless device, and the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and a clock source, and the clock source is provided for the clock link where the wireless device is located.
  • a clock reference network device the clock link is a link for clock synchronization between the clock source and the wireless device.
  • a processing module configured to determine a first clock synchronization accuracy according to the clock synchronization information, where the first clock synchronization accuracy is a clock synchronization accuracy between the wireless device and the wireless device controller.
  • the wireless device is connected to the wireless device controller through at least one clock information transmission device, or the wireless device is directly connected to the wireless device controller.
  • the clock synchronization information is carried in the management message.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the clock synchronization information includes an identifier of the clock source, an identifier of a source port, and a second clock synchronization accuracy; where the identifier of the source port is used to indicate that the wireless device in the clock link
  • An upper-level network device that provides clock synchronization; the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the upper-level network device.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the processing module is specifically configured to determine the The second clock synchronization accuracy is the first clock synchronization accuracy.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the processing module is specifically configured to: when the identifier of the clock source is the same as the identifier of the wireless device controller, and the identifier of the clock source is different from the identifier of the source port, according to The quantity information of the communication channel, the second clock synchronization accuracy and the preset clock synchronization accuracy determine the first clock synchronization accuracy.
  • the processing module is specifically configured to: determine a product obtained by multiplying the difference between the number of communication channels and 1 by a preset clock synchronization accuracy; the wireless device controller determines the product and The sum of the second clock synchronization accuracy is the first clock synchronization accuracy.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy; where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the processing module is specifically configured to determine that the third clock synchronization precision is the first clock synchronization precision when the identifier of the clock source is the same as the identifier of the wireless device controller.
  • the transceiver module is further configured to send the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device.
  • the wireless device includes a first wireless device and a second wireless device, the clock synchronization accuracy between the first wireless device and the wireless device controller is a fourth clock synchronization accuracy, and the second The clock synchronization accuracy between the wireless device and the wireless device controller is the fifth clock synchronization accuracy;
  • the processing module is also used to:
  • the first wireless device Determine whether to allow the first wireless device to cooperate with the second wireless device to run a first service according to the sixth clock synchronization accuracy, where the first service is a service that requires two or more wireless devices to perform coordinated operations.
  • the present application provides a wireless device, where the wireless device includes a transceiver module and a processing module.
  • the processing module is configured to generate clock synchronization information
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and a clock source
  • the clock source provides a clock reference for the clock link where the wireless device is located
  • the clock link is a link for clock synchronization between the clock source and the wireless device.
  • a transceiver module configured to send clock synchronization information to the wireless device controller, where the clock synchronization information is used to determine a first clock synchronization accuracy, where the first clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the wireless device controller .
  • the wireless device is connected to the wireless device controller through at least one clock information transmission device, or the wireless device is directly connected to the wireless device controller.
  • the clock synchronization information is carried in the management message.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the clock synchronization information includes an identifier of the clock source, an identifier of a source port, and a second clock synchronization accuracy; where the identifier of the source port is used to indicate that the wireless device in the clock link
  • An upper-level network device that provides clock synchronization; the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the upper-level network device of the wireless device.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy, where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • the embodiment of the present application provides a communication device.
  • the communication device may be the wireless device controller in the foregoing embodiments, or may be a chip or a functional module in the wireless device controller.
  • the communication device may include a processing module and a transceiver module.
  • the processing module may be a processor, and the transceiver module may be a transceiver;
  • the wireless device controller may also include a storage module, and the storage module may be a memory; the storage module is used for Instructions are stored, and the processing module executes the instructions stored in the storage module, so that the wireless device controller executes the method in the first aspect or any implementation manner of the first aspect.
  • the processing module may be a processor, and the transceiver module may be an input/output interface, a pin or a circuit, etc.; the processing module executes the instructions stored in the storage module to Make the wireless device controller execute the method in the first aspect or any implementation manner of the first aspect.
  • the storage module may be a storage module in the chip (for example, a register, a cache, etc.), or a storage module in the wireless device controller located outside the chip (for example, a read-only memory, a random access memory, etc.) .
  • the embodiment of the present application provides a communication device.
  • the communication device may be the wireless device in the foregoing implementation manner, or may be a chip or a functional module in the wireless device.
  • the communication device may include a processing module and a transceiver module.
  • the processing module may be a processor, and the transceiver module may be a transceiver;
  • the wireless device may also include a storage module, which may be a memory; the storage module is used to store instructions, the The processing module executes the instructions stored in the storage module, so that the wireless device executes the second aspect or the method in any implementation manner of the second aspect.
  • the processing module may be a processor, and the transceiver module may be an input/output interface, a pin or a circuit, etc.; the processing module executes the instructions stored in the storage module, so that the The wireless device executes the second aspect or the method in any implementation manner of the second aspect.
  • the storage module may be a storage module in the chip (for example, a register, a cache, etc.), or a storage module in the wireless device outside the chip (for example, a read-only memory, a random access memory, etc.).
  • the present application provides a communication device, which may be an integrated circuit chip.
  • the integrated circuit chip includes a processor.
  • the processor is coupled with a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the communication device executes the first aspect or the method in any one of the implementation manners of the first aspect; Alternatively, execute the second aspect or the method in any implementation manner of the second aspect.
  • the embodiment of the present application provides a computer program product containing instructions, which, when run on a computer, enables the computer to execute the various implementations of the foregoing first aspect or the second aspect, as well as the foregoing aspects The method described in any one of the implementations.
  • the embodiment of the present application provides a computer-readable storage medium, including instructions, when the instructions are run on the computer, so that the computer executes the above-mentioned first aspect or the second aspect, and each of the above-mentioned various aspects.
  • an embodiment of the present application provides a communication system, the communication system includes the wireless device controller in any implementation manner of the above third aspect and the third aspect, and any of the above fourth aspect and the fourth aspect A wireless device in one embodiment.
  • FIG. 1 is an example diagram of the fronthaul network involved in the present application
  • Fig. 2 is a flowchart of the method for obtaining clock synchronization information in the present application
  • Fig. 3 is another flowchart of the method for obtaining clock synchronization information in the present application
  • Fig. 4 is another flowchart of the method for obtaining clock synchronization information in the present application.
  • FIG. 5 is a schematic diagram of an embodiment of a communication device in the present application.
  • FIG. 6 is a schematic diagram of another embodiment of a communication device in the present application.
  • FIG. 7 is a schematic diagram of another embodiment of a communication device in the present application.
  • Fig. 8 is a schematic diagram of another embodiment of a communication device in this application.
  • Clock synchronization refers to the slave clock (slave clock) adjusting the time (or phase) of the slave clock based on the master clock (master clock) (also known as the parent clock (parent clock)), so that the time of the slave clock and the aforementioned master clock (or phase) deviation is kept within a small error range.
  • master clock also known as the parent clock (parent clock)
  • master clock also known as the parent clock (parent clock)
  • the master clock and the slave clock in clock synchronization are a pair of relative concepts. For example, if device A performs clock synchronization based on device B, and device B performs clock synchronization based on device C, at this time, for device A, device B is the master clock, and device A is the slave clock; for device C, device C Master clock, device B is slave clock.
  • Clock synchronization accuracy refers to the fluctuation range of the difference between the time (or phase) of the measured clock and the time (or phase) of the reference clock. Generally, it can be represented by the time (or phase) error mean value of the clock under test and the reference clock within a period of test measurement. For example, if the clock synchronization accuracy of the clock under test is 50 ns, it means that the time (or phase) difference between the clock under test and the time (or phase) of the reference clock fluctuates within 50 ns. In some embodiments, the foregoing clock synchronization accuracy may also be referred to as synchronization accuracy or time synchronization accuracy.
  • the aforementioned reference clock may be the master clock of the clock under test, or the clock source of the clock under test, or other clocks, which are not specifically limited here.
  • the clock synchronization accuracy refers to the fluctuation range of the time or phase difference between a wireless device and a certain transmission device or a certain wireless device controller.
  • Clock source refers to a device that provides a clock reference for a certain range of network devices (for example, network devices on a clock link).
  • the clock reference is the final reference for clock synchronization or clock calibration.
  • Each device on the clock link directly or indirectly uses the clock source as a reference for clock synchronization, that is, the device on the clock link performs clock synchronization.
  • the trace source is the aforementioned clock source.
  • Clock link refers to the link connected in series by multiple devices that perform clock synchronization step by step.
  • the source of the clock link is the clock source, and the clock link can connect multiple devices (for example, the following Introduced transmission equipment and wireless equipment).
  • the clock link in this application mainly refers to the clock link formed by directly connecting the wireless device controller and the wireless device through an optical fiber, or the clock link formed by connecting the wireless device controller to the wireless device through at least one transmission device.
  • the method for acquiring clock synchronization information proposed in this application is mainly applied in a network involving clock synchronization between a wireless device and a wireless device controller.
  • the network for clock synchronization between the wireless device and the wireless device controller may be a network based on the 4th generation mobile communication technology (4G) or the 5th generation mobile communication technology (the 5th generation).
  • the mobile communication technology (5G) network can also be based on the sixth generation mobile information technology (the 6th generation mobile communication technology, 6G) network, and may even be applicable to future communication networks in the future, which is not limited here.
  • the network on which the wireless device and the wireless device controller perform clock synchronization may be a front-haul transport network (front-haul transport network, FTN). It should be understood that with the development of communication technologies, the network on which the wireless device and the wireless device controller perform clock synchronization may also be other networks, or use other names, which are not specifically limited here. This application introduces the fronthaul network as an example.
  • the network involving clock synchronization between the wireless device and the wireless device controller may be the fronthaul network of the 4G long term evolution (long term evolution advanced, LTE) system, the fronthaul network of the 5G new radio (new radio, NR) system, the 6G The fronthaul network of the system, and even the fronthaul network in the subsequent evolution standard.
  • LTE long term evolution
  • NR new radio
  • This application does not limit the applicable network standard and name of the network for the method of obtaining clock synchronization information.
  • the fronthaul network in this application is mainly used to connect wireless devices and wireless device controllers, and the fronthaul network includes one or more transmission devices, and a transmission medium (for example, optical fiber or cable, etc.) connecting each transmission device.
  • the wireless device controller may be directly connected to the wireless device through a transmission medium in the fronthaul network, or the wireless device controller may be connected to the wireless device through one or more transmission devices in the fronthaul network.
  • the wireless device controller may be a network element or device with a baseband signal processing function, or a device with wireless signal processing for managing an access network (radio access network, RAN).
  • the wireless device controller can complete baseband signal processing functions such as encoding, multiplexing, modulation and spread spectrum, can complete the function of processing signaling from wireless devices, can realize the functions of local management and remote operation and maintenance of wireless devices, and Provide clock synchronization function for transmission equipment or wireless equipment.
  • the wireless device controller may be a base band processing unit (base band unit, BBU) (also referred to as an indoor base band processing unit (building base band unit, BBU) in an access network device (for example, a base station). ).
  • BBU base band processing unit
  • BBU building base band unit
  • the wireless device controller may be a baseband processing unit in an evolved base station (evolutional node B, eNB or e-NodeB) BBU.
  • the wireless device controller may be a baseband processing unit BBU in a next generation node B (next generation node B, gNB).
  • the wireless device controller may also be a distributed unit in a cloud access network (cloud radio access network, CloudRAN) or an open radio access network (open radio access network, ORAN) system (distributed unit, DU), can also be a centralized unit (centralized unit, CU), or a combined structure of a centralized unit CU and a distributed unit DU.
  • the radio device controller may also be other devices or devices with a baseband signal processing function, or other devices or devices capable of managing radio signal processing of the access network RAN.
  • the wireless equipment controller is called a radio equipment controller (radio equipment control, REC); in the enhanced common public radio interface (enhanced common public radio interface, eCPRI) protocol, the wireless equipment controller is called eCPRI wireless equipment controller (eCPRI radio equipment control, eREC); in other protocols that provide communication between the baseband unit and the radio frequency unit, the wireless equipment controller is also Other titles are possible. Specifically, the present application does not limit the specific implementation form of the wireless device controller, and the title of "wireless device controller" will be introduced later.
  • the foregoing wireless device may be a radio unit (radio unit, RU) (also referred to as a radio frequency unit) in an access network RAN device (for example, a base station), or may be another device capable of processing wireless signals (for example, an intermediate frequency signal, A processing device for the function of radio frequency signals, etc.).
  • the wireless device may be a remote radio unit (remote radio unit, RRU) (also referred to as a remote radio unit) or a remote radio head (remote radio head, RRH) in the base station.
  • the RRU is generally used for the conventional outdoor coverage of the macro station
  • the RRH is generally used for the indoor coverage of the indoor distribution system.
  • the wireless device may also be an active antenna processing unit (active antenna unit, AAU), that is, a processing unit integrated with an RRU (or RRH) and an antenna.
  • AAU active antenna processing unit
  • the wireless device may also be other devices or devices capable of transmitting and receiving radio frequency signals and processing radio frequency signals or intermediate frequency signals.
  • the aforementioned wireless device can have some functions of the physical layer of the BBU, such as modulation, demodulation, layer mapping, and Fourier transform ( fast fourier transformation, FFT) and channel estimation/equalization functions.
  • the title of the wireless device may be different.
  • wireless devices are called radio equipment (radio equipment, RE); in the enhanced common public radio interface (eCPRI) protocol, wireless The equipment is called eCPRI radio equipment (eCPRI radio equipment, eRE); in other protocols that provide communication between the baseband unit and the radio frequency unit, the radio equipment can also have other titles.
  • CPRI common public radio interface
  • eCPRI enhanced common public radio interface
  • eCPRI radio equipment eCPRI radio equipment
  • eRE eCPRI radio equipment
  • the present application does not limit the specific implementation form of the wireless device, which will be introduced with the title of "wireless device” hereinafter.
  • the foregoing transmission device is a network device used to transmit information related to clock synchronization (or time synchronization) (hereinafter referred to as clock information) in the fronthaul network. Therefore, the foregoing transmission device may also be referred to as clock information transmission device.
  • the transmission equipment may be a transmission equipment (transmission equipment, TE) with a boundary clock (boundary clock, BC) function.
  • packet transport network packet transport network, PTN
  • routers, switches microwave equipment
  • optical transport network optical transport network
  • OTN optical transport network
  • the transmission device may also be other devices or devices that have functions of clock synchronization or clock information transmission.
  • the present application does not limit the specific implementation form of the transmission device, and it will be introduced with the title of "transmission device" hereinafter.
  • the wireless device controller communicates with the wireless device through a fronthaul interface, and performs clock synchronization through a clock synchronization protocol.
  • the fronthaul interface may be an enhanced common public radio interface (enhanced common public radio interface, eCPRI), and may also be another interface that provides communication functions for the wireless device and the wireless device controller, which is not specifically limited here.
  • the clock synchronization protocol may be a precision time protocol (precision time protocol, PTP) (also known as the IEEE1588 protocol), and may also be other protocols that adopt a step-by-step synchronization method for clock synchronization, which is not limited here.
  • the wireless device controller when the wireless device controller is directly connected to the wireless device, the wireless device performs clock synchronization based on the wireless device controller.
  • the wireless device controller When the wireless device controller is connected to the wireless device through other transmission devices, the wireless device synchronizes to the wireless device controller in a step-by-step synchronization manner based on the transmission device connected to the wireless device.
  • wireless device 1, wireless device 2, wireless device 3, and wireless device 4 are connected to wireless device controller 1 and wireless device controller 2 through a fronthaul network.
  • the wireless device controller 1 is directly connected to the wireless device 3; the wireless device controller 1 can be connected to the wireless device 4 through the transmission device 1 and the transmission device 5 in the fronthaul network, or can be connected to the wireless device 4 through the transmission device 1 and the transmission device 5 in the fronthaul network.
  • Device 5 and transmission device 4 are connected to wireless device 2, and may also be connected to wireless device 1 through transmission device 1, transmission device 2, and transmission device 3 in the fronthaul network.
  • the wireless device controller 2 may also be connected to one or more wireless devices in FIG. 1 through one or more transmission devices in FIG. 1 . The details are not listed here.
  • a wireless device performs clock synchronization with a wireless device controller through a clock link, and the wireless device can obtain the clock synchronization accuracy of an upper-level network device directly connected to the wireless device. For example, at a certain moment, if transmission device 1 performs clock synchronization based on the system clock of wireless device controller 1, then transmission device 5 performs clock synchronization based on the system clock of transmission device 1, and finally wireless device 4 performs clock synchronization based on the system clock of transmission device 5.
  • the system clock performs clock synchronization, and the clock link of the wireless device 4 is "f-g-h".
  • the wireless device 4 can obtain the clock synchronization accuracy of the upper-level network device (ie, the transmission device 5 ) relative to the wireless device 4 .
  • transmission device 2 performs clock synchronization based on the system clock of wireless device controller 2
  • transmission device 3 performs clock synchronization based on the system clock of transmission device 2
  • transmission device 5 performs clock synchronization based on transmission device 3
  • the system clock of the wireless device 4 performs clock synchronization
  • the wireless device 4 performs clock synchronization based on the system clock of the transmission device 5, and the clock link of the wireless device 4 is "a-b-k-h”.
  • the wireless device 4 can obtain the clock synchronization accuracy of the upper-level network device (ie, the transmission device 5 ) relative to the wireless device 4 .
  • the wireless device controller is directly connected to the wireless device, the wireless device only performs clock synchronization based on the wireless device controller.
  • the wireless device 3 is directly connected to the wireless device controller 1 through an optical fiber, and the wireless device 3 can directly perform clock synchronization based on the system clock of the wireless device controller 1, that is, the wireless device 3 acts as a slave clock and the wireless device controller 1 acts as a master clock
  • the clock link of the wireless device 3 is "i".
  • the wireless device 3 can obtain the clock synchronization accuracy of the upper-level network device (that is, the wireless device controller 1 ) relative to the wireless device 3 .
  • the clock synchronization accuracy of the wireless device relative to the wireless device controller is related to the fronthaul network, the clock synchronization accuracy of the same wireless device relative to the clock sources on different clock links is different. of. Since the management plane and the clock synchronization plane between the wireless device and the wireless device controller are not completely consistent, for example, the wireless device controller 1 provides a clock synchronization reference for the wireless device 2 through the clock link "f-g-l-e", however, the wireless Device 2 may need to perform data or signaling interaction with wireless device controller 2 . Therefore, for the wireless device controller 2 , the wireless device controller 2 may not be able to know the clock synchronization accuracy of the wireless device 2 relative to the wireless device controller 2 .
  • the wireless device can provide the wireless controller with information for determining the clock synchronization accuracy of the wireless device relative to a certain device (that is, the clock synchronization information described later ), and then the wireless device controller can determine the clock synchronization accuracy of the wireless device relative to the wireless device controller based on the aforementioned clock synchronization information. Further, it is beneficial for the wireless device controller to accurately determine the clock synchronization precision between two wireless devices. Furthermore, it is beneficial for the wireless device controller to decide whether the aforementioned two wireless devices run a certain service that requires coordinated operation.
  • the main flow of the method for acquiring clock synchronization information proposed in this application will be introduced below with reference to FIG. 2 .
  • the wireless device and the wireless device controller will perform the following steps.
  • Step 201 the wireless device sends clock synchronization information to the wireless device controller; correspondingly, the wireless device controller receives clock synchronization information from the wireless device.
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source, and it can be understood that the clock synchronization information is information used to determine the clock synchronization accuracy between the wireless device and the clock source.
  • the wireless device controller can determine the clock synchronization accuracy between the wireless device and the clock source based on the clock synchronization information received from the wireless device, that is, the time (or phase) of the system clock of the wireless device and the system clock of the clock source The range in which the difference between times (or phases) fluctuates.
  • the clock source is a device that provides a clock reference reference for the clock link where the wireless device is located, and the clock reference reference is a final reference basis for clock synchronization or clock calibration. All devices (including transmission devices and wireless devices) on the clock link directly or indirectly use the system clock of the clock source as a reference for clock synchronization.
  • the clock link is a link between the clock source and the wireless device for clock synchronization.
  • transmission device 2 performs clock synchronization based on wireless device controller 2
  • transmission device 3 performs clock synchronization based on transmission device 2
  • wireless device 1 performs clock synchronization based on transmission device 3
  • "a-b-d" constitutes a clock chain road. Since the transmission device 2 is directly based on the wireless device controller 2 as the reference reference for clock synchronization, and the transmission device 3 and the wireless device 1 are indirectly based on the wireless device controller 2 as the reference reference for clock synchronization, therefore, the wireless device controller 2 is the Clock source for clock link "a-b-d".
  • transmission device 1 performs clock synchronization based on wireless device controller 1
  • transmission device 2 performs clock synchronization based on transmission device 1
  • transmission device 3 performs clock synchronization based on transmission device 2
  • wireless device 1 performs clock synchronization based on transmission device 3
  • “f-j-b-d” constitutes a clock chain.
  • transmission device 1 is directly based on wireless device controller 1 as a reference reference for clock synchronization
  • transmission device 2, transmission device 3, and wireless device 1 are indirectly based on wireless device controller 1 as a reference reference for clock synchronization. Therefore, the wireless device controller 1 is the clock source for the clock link "f-j-b-d".
  • the clock source may also be other devices that provide clock synchronization references for the foregoing clock links, which are not specifically listed here.
  • the clock source in the clock synchronization information sent by the wireless device to the wireless device controller may be the wireless device controller that received the aforementioned clock synchronization information.
  • the wireless device and the wireless device controller are located on the same clock On the synchronization link; it may also be the wireless device controller on other clock links.
  • the wireless device may be clock-synchronized through another clock link, and the clock link does not include the aforementioned received clock synchronization information
  • the wireless device controller it may also be a network device on other links or topologies that can provide a clock as a reference, which is not specifically limited here.
  • the wireless device controller does not know whether the wireless device is on the same clock link as the one receiving the clock synchronization information, nor does it know whether the The wireless device is based on which clock source and which clock link the clock synchronization is performed on. After the wireless device controller parses the aforementioned clock synchronization information, the wireless device controller can determine which clock source and which clock link the wireless device is based on for clock synchronization.
  • the clock synchronization information includes an identifier of a clock source, an identifier of a source port, and a second clock synchronization precision.
  • the identifier of the clock source is used to indicate the device that provides the clock reference for the clock link where the wireless device is located. Specifically, please refer to the introduction about the clock source above, which will not be repeated here.
  • the identifier of the clock source may be a grandmaster clock identity (grandmasterIdentity) in the precision time protocol (PTP). It should be understood that in other clock synchronization protocols, the clock source and the identifier of the clock source may also use other names, which are not specifically limited here.
  • the identifier of the source port is used to indicate an upper-level network device in the clock link that provides clock synchronization to the wireless device.
  • the upper-level network device is a network device directly connected to the wireless device, and the wireless device performs clock synchronization directly based on the network device.
  • the upper-level network device may be a transmission device connected to the wireless device, or may be a wireless device controller. Exemplarily, taking FIG. 1 as an example, if the wireless device sending clock synchronization information is wireless device 1, then the upper-level network device of wireless device 1 is transmission device 3, and the identifier of the source port is the identifier of transmission device 3.
  • the wireless device sending clock synchronization information is wireless device 2
  • the upper-level network device of wireless device 2 is transmission device 4
  • the identifier of the source port is the identifier of transmission device 4
  • the wireless device sending clock synchronization information is wireless device 3
  • the upper-level network device of wireless device 3 is wireless device controller 1
  • the identifier of the source port is the identifier of wireless device controller 1
  • the source port identifier may be sourcePortIdentity in the precision time protocol (PTP). It should be understood that in other clock synchronization protocols, the source port and the identifier of the source port may also use other names, which are not specifically limited here.
  • the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device with respect to the upper-level network device of the wireless device, that is, the time (or phase) of the system clock of the wireless device is the same as that of the upper-level network device of the wireless device.
  • the second clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the transmission device; if the wireless device If the upper-level network device is a wireless device controller directly connected to the wireless device, the second clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the wireless device controller.
  • the second clock synchronization accuracy may be called local accuracy (Local Accuracy). It should be understood that in other clock synchronization protocols, the clock synchronization accuracy of a certain network device relative to the network device at the upper level of the network device may also use other names, which are not specifically limited here.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the information about the number of communication channels can indicate the number of communication channels.
  • the clock information may be information related to operations such as clock synchronization or clock calibration.
  • the clock information includes part or all of the foregoing clock synchronization information.
  • the device capable of transmitting clock information may be a wireless device controller on a clock link, and the wireless device controller may send clock information to a transmission device connected to the wireless device controller; the device capable of transmitting clock information may also be A transmission device on a clock link that can send clock information to a connected transmission device or a connected wireless device; a device that can transmit clock information can also be a wireless device that can send clock information to a connected transmission device .
  • the clock synchronization protocol adopted by the wireless device and the wireless device controller counts from 0 when calculating the communication channel, that is, when there are 3 communications on the clock link between the wireless device and the wireless device controller channel, the value recorded by the counter in the network device is 2.
  • the quantity information of the communication channel may be expressed by adding one to the value of the counter in the network device.
  • the number information of communication channels may be expressed by adding one to the value of steps (stepsRemoved).
  • the clock synchronization protocol adopted by the wireless device and the wireless device controller counts from 1 when calculating the communication channel, that is, when there are 3 communications on the clock link between the wireless device and the wireless device controller channel, the value recorded by the counter in the network device is 3.
  • the quantity information of the communication channel may be directly represented by the value of the counter in the network device.
  • the wireless device controller 2 the transmission device 2, the transmission device 3 and the wireless device 1 can form a clock link (called clock link 1)
  • the clock link 1 The communication channel includes a communication channel a between the wireless device controller 2 and the transmission device 2 , a communication channel b between the transmission device 2 and the transmission device 3 , and a communication channel d between the transmission device 3 and the wireless device 1 .
  • the number of communication channels on the clock link is 3, which means that there are 3 communication channels from the wireless device 1 to the clock source on the clock link (that is, the wireless device controller 2 ).
  • the wireless device controller 1, transmission device 1, transmission device 2, transmission device 3, and wireless device 1 can form a clock link (called clock link 2)
  • the communication channel on the clock link 2 Including the communication channel f between the wireless device controller 1 and the transmission device 1, the communication channel j between the transmission device 1 and the transmission device 2, the communication channel b between the transmission device 2 and the transmission device 3, the communication channel b between the transmission device 3 and the wireless Communication channel d between devices 1.
  • the number of communication channels on the clock link 2 is 4, which means that there are 4 communication channels from the wireless device 1 to the clock source on the clock link (ie, the wireless device controller 1).
  • the clock synchronization information also includes the identifier of the wireless device.
  • the identifier of the wireless device is used to clearly identify the wireless device that sends the clock synchronization information to the wireless device controller, so that the wireless device controller can determine which wireless device the clock synchronization information comes from based on the identifier of the wireless device.
  • the identification of the wireless devices enables the wireless device sending the clock synchronization information to be distinguished from other wireless devices.
  • the wireless device may be identified by a clock identity (clockIdentity).
  • the signaling sent by the wireless device to the controller of the wireless device for carrying the aforementioned clock synchronization information may also carry the identifier of the wireless device.
  • the identifier of the wireless device does not belong to the clock synchronization information, but the identifier of the wireless device can also clearly tell the wireless device controller the identity of the wireless device that sends the clock synchronization information.
  • the identifier of the wireless device may be an Internet protocol (internet protocol, IP) address of the wireless device or a media access control (media access control address, MAC) address of the wireless device, or other devices that can identify the wireless device Identity information, which is not limited here.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy.
  • the identifier of the clock source is used to indicate the device that provides the clock reference for the clock link where the wireless device is located. Specifically, for the identification of the clock source, reference may be made to the relevant introduction in the previous implementation manner, and details are not described here.
  • the third clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the clock source, that is, the time (or phase) of the system clock of the wireless device and the time (or phase) of the system clock of the clock source The fluctuation range of the difference.
  • the third clock synchronization accuracy may be called total accuracy (Total Accuracy). It should be understood that in other clock synchronization protocols, the clock synchronization accuracy of a certain network device relative to the clock source on the clock link where the network device is located may also use other names, which are not specifically limited here.
  • the clock synchronization information also includes the identifier of the wireless device.
  • the function and implementation form of the identification of the wireless device are similar to those of the identification of the wireless device in the foregoing embodiments. For details, please refer to the relevant introduction above, and details are not repeated here.
  • the clock synchronization information in this application may be carried in a message that the wireless device can directly send to the wireless device controller in a unicast manner.
  • the wireless device may send the foregoing clock synchronization information to the wireless device controller in an IP packet unicast manner. Compared with the transmission mode of multicast or broadcast, it is beneficial to avoid signaling storm and reduce the transmission load of the network.
  • the clock synchronization information can be carried between the wireless device and the wireless device in management messages between controllers.
  • the foregoing management message may be a management message in the 1588 protocol.
  • Step 202 the wireless device controller determines a first clock synchronization accuracy according to the clock synchronization information, where the first clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the wireless device controller.
  • the first clock synchronization accuracy is the clock synchronization accuracy between the wireless device that sends the clock synchronization information and the wireless device controller that receives the clock synchronization information, that is, the time (or phase) of the system clock of the wireless device and the time (or phase) of the wireless device The fluctuation range of the difference between the time (or phase) of the controller's system clock.
  • the implementation manners of determining the first clock synchronization accuracy by the wireless device controller are also different.
  • the clock synchronization information includes an identifier of a clock source and an identifier of a source port.
  • the clock synchronization information further includes a second clock synchronization accuracy, where the second clock synchronization accuracy is a clock synchronization accuracy of the wireless device with respect to the upper-level network device of the wireless device.
  • the wireless device controller will determine the relationship between the identifier of the clock source, the identifier of the wireless device controller, and the identifier of the source port, and based on the aforementioned three (namely, the identifier of the clock source, the identifier of the wireless device controller, and The relationship between the identifiers of the source ports determines how to determine the synchronization accuracy of the first clock.
  • the wireless device controller determines the second clock synchronization accuracy is the first clock synchronization accuracy. It can also be understood that the wireless device controller uses the value of the second clock synchronization precision in the clock synchronization information as the value of the first clock synchronization precision.
  • the identifier of the clock source is the same as the identifier of the wireless device controller, which means that the clock source tracked step by step by the wireless device is the wireless device controller receiving the clock synchronization information, rather than the clock source of other clock links.
  • the clock synchronization reference of the wireless device is the wireless device controller that receives the clock synchronization information.
  • the wireless device controller can calculate the clock synchronization accuracy between the wireless device and the wireless device controller (that is, the first clock synchronization accuracy) based on the clock synchronization information, without the need to obtain information from other clock sources or other wireless device control The device obtains other information about clock synchronization.
  • the identification of the clock source is the same as the identification of the source port, indicating that the upper-level network device of the wireless device and the clock source are the same device, that is, the wireless device is directly connected to the clock source, that is, the wireless device is directly based on the clock source Perform clock synchronization.
  • the aforementioned second clock synchronization accuracy represents the clock synchronization accuracy of the wireless device relative to the clock source.
  • the wireless device controller can determine that the wireless device and the wireless device controller Direct connection, that is, the wireless device performs clock synchronization directly based on the clock source. Further, the wireless device controller can determine that the second clock synchronization accuracy carried in the clock synchronization information represents the clock synchronization accuracy (that is, the first clock synchronization accuracy) of the wireless device relative to the wireless device controller. Therefore, the wireless device controller uses the value of the second clock synchronization precision in the clock synchronization information as the value of the first clock synchronization precision.
  • the wireless device controller when the identifier of the clock source is the same as the identifier of the wireless device controller, and the identifier of the clock source is different from the identifier of the source port, the wireless device controller The quantity information, the second clock synchronization accuracy and the preset clock synchronization accuracy determine the first clock synchronization accuracy.
  • the identifier of the clock source is different from the identifier of the source port, which means that the upper-level network device of the wireless device is not the same device as the clock source, and the wireless device is connected to the clock source through at least one transmission device.
  • the foregoing at least one transmission device includes an upper-level network device of the foregoing wireless device.
  • the aforementioned second clock synchronization accuracy indicates the clock synchronization accuracy of the wireless device with respect to the upper-level network device that provides clock synchronization to the wireless device, but the second clock synchronization accuracy cannot reflect the clock synchronization accuracy of the wireless device with respect to the clock source. clock synchronization accuracy.
  • the wireless device controller needs to determine the topology of the clock link between the wireless device and the wireless device controller in combination with the information on the number of communication channels, and then estimate the clock synchronization accuracy between the wireless device and the wireless device controller (ie first clock synchronization accuracy).
  • the quantity information of the communication channels can reflect how many levels of clock synchronization need to be experienced between the wireless device and the wireless device controller.
  • the wireless device controller can estimate the clock synchronization accuracy between two network devices connected by each communication channel (hereinafter referred to as clock synchronization accuracy at all levels), then the wireless device controller can estimate the synchronization accuracy of each level of clock synchronization The cumulative sum of is used as the clock synchronization accuracy between the wireless device and the wireless device controller (ie, the first clock synchronization accuracy).
  • the wireless device controller stores preset clock synchronization accuracy.
  • the preset clock synchronization precision may be a clock synchronization precision between two network devices predefined in a protocol or standard.
  • ITU-T G.8273.2 defines the one-hop synchronization accuracy of boundary clock BC devices, among which, class A (class A) is 100ns, class B (class B) is 70ns, class C (class C) is 30ns, Class D (class D) is 5ns.
  • the preset clock synchronization accuracy may also be an empirical value artificially set in the wireless device controller, which represents a possible value of the clock synchronization accuracy between two network devices in the clock link.
  • the second clock synchronization accuracy can determine the wireless The clock synchronization accuracy of the device relative to the upper-level network device of the wireless device. Therefore, the wireless device controller can use the product obtained by multiplying the difference between the number of communication channels and 1 by the preset clock synchronization accuracy as the wireless The clock synchronization accuracy between the device's upper-level network device and the wireless device controller. Then, the wireless device controller calculates the sum of the aforementioned product and the second clock synchronization precision as the first clock synchronization precision.
  • the wireless device controller can calculate the number of communication channels between the wireless device and the wireless device controller.
  • the topological structure of the clock link between them and then determine the first clock synchronization accuracy based on the topology structure of the clock link, the second clock synchronization accuracy and the preset clock synchronization accuracy.
  • this embodiment is beneficial to ensure the accuracy of the wireless device controller when estimating the first clock synchronization accuracy, and further It is beneficial for the wireless device controller to make more accurate and reasonable decisions regarding the services of the wireless device.
  • the fronthaul network only provides the wireless device with the clock synchronization accuracy between the wireless device and the upper-level network device of the wireless device (that is, the upper-level network device that provides clock synchronization to the wireless device) (that is, the second clock synchronization accuracy), therefore, what the wireless device can provide to the wireless device controller is the clock synchronization accuracy between the wireless device and the upper-level network device of the wireless device (that is, the second clock synchronization accuracy ).
  • the second clock synchronization accuracy also represents the first clock synchronization accuracy; if the upper-level network device of the wireless device is not the wireless device controller , then the wireless device controller also needs to determine the first clock synchronization accuracy based on other parameters (eg, preset clock synchronization accuracy and information about the number of communication channels). No matter which implementation manner is adopted, the wireless device controller may determine the first clock synchronization accuracy based on the received clock synchronization information. Furthermore, it is beneficial for the wireless device controller to decide whether to allow the wireless device to trigger a certain service based on the first clock synchronization accuracy.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy, where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • what the wireless device can provide to the wireless device controller is the clock synchronization accuracy of the wireless device relative to the clock source, that is, the third clock synchronization accuracy.
  • the clock source is a wireless device controller receiving the clock synchronization signal
  • the value of the third clock synchronization accuracy represents the clock synchronization accuracy of the wireless device relative to the wireless device controller (ie, the first clock synchronization accuracy). Therefore, when the identifier of the clock source is the same as the identifier of the wireless device controller, the wireless device controller determines that the third clock synchronization accuracy is the first clock synchronization accuracy.
  • the wireless device can provide the wireless device controller with the relative The clock synchronization accuracy between the clock sources, that is, the third clock synchronization accuracy. If the clock source is the same device as the wireless device controller, the third clock synchronization precision carried in the clock synchronization information is the first clock synchronization precision. Therefore, when the identifier of the clock source is the same as the identifier of the wireless device controller, the wireless device controller can determine the first clock synchronization accuracy based on the received clock synchronization information. Furthermore, it is beneficial for the wireless device controller to decide whether to allow the wireless device to trigger a certain service based on the first clock synchronization accuracy.
  • the wireless device controller may base on the respective clocks of the aforementioned wireless devices relative to the wireless device controller Synchronization Accuracy determines the accuracy of clock synchronization between the two or more wireless devices.
  • the wireless device controller determines the first wireless device according to the clock synchronization information received from the first wireless device.
  • the wireless device controller determines a fifth clock synchronization precision according to clock synchronization information received from the second wireless device.
  • the fourth clock synchronization precision is the clock synchronization precision between the first wireless device and the wireless device controller
  • the fifth clock synchronization precision is the clock synchronization between the second wireless device and the wireless device controller precision.
  • the wireless device controller determines a sixth clock synchronization accuracy according to the fourth clock synchronization accuracy and the fifth clock synchronization accuracy, and the sixth clock synchronization accuracy is the distance between the first wireless device and the second wireless device. Clock synchronization accuracy; then, the wireless device controller determines whether to allow the first wireless device and the second wireless device to cooperate to run the first service according to the sixth clock synchronization accuracy, and the first service requires two or more wireless devices.
  • the first service may be a service involving a multiple-input multiple-output technology (multiple-input multiple-output, MIMO), or a service involving carrier aggregation (carrier aggregation, CA). This application does not limit the specific type of the first service.
  • the wireless device controller determines the sixth clock synchronization accuracy according to the fourth clock synchronization accuracy and the fifth clock synchronization accuracy, specifically, the wireless device controller calculates the fourth clock synchronization accuracy and the fifth clock synchronization accuracy.
  • the sum of the five clock synchronization precisions gives the sixth clock synchronization precision.
  • the wireless device controller determines to allow the first wireless device to cooperate with the second wireless device to run the first service
  • the wireless device controller determines that the first wireless device is not allowed to cooperate with the second wireless device to run the first service.
  • the clock synchronization accuracy corresponding to the first service can be understood as the maximum time (or phase) deviation that the first service can tolerate.
  • the clock synchronization accuracy between certain two wireless devices is less than the clock synchronization accuracy corresponding to the first service, it can be understood that the time (or phase) deviation of the two wireless devices will not affect the operation of the aforementioned first service ;
  • the clock synchronization accuracy between two wireless devices is greater than the clock synchronization accuracy corresponding to the first service, it can be understood that the time (or phase) deviation of the two wireless devices is relatively large, and there is a greater possibility of Therefore, in this case, it is not suggested that the first wireless device and the second wireless device cooperate to run the first service.
  • the wireless device controller cannot know which clock synchronization link the wireless device is based on, nor can it know which clock source is on the clock link for clock synchronization of the wireless device Internet equipment. Therefore, the wireless device controller cannot know the clock synchronization accuracy of the wireless device relative to the wireless device controller, and further, the wireless device controller cannot manage some services of the wireless device based on the clock synchronization accuracy.
  • the wireless device can provide the wireless controller with information for determining the clock synchronization accuracy of the wireless device relative to the clock source (that is, clock synchronization information), and then the wireless device controller can Determining the clock synchronization accuracy of the wireless device relative to the wireless device controller (that is, the first clock synchronization accuracy), therefore, it is beneficial for the wireless device controller to manage the wireless device based on the first clock synchronization accuracy. Furthermore, it is beneficial for the wireless device controller to accurately determine the clock synchronization precision between the two wireless devices. Furthermore, it is beneficial for the wireless device controller to decide whether the aforementioned two wireless devices run a certain service that requires coordinated operation.
  • the clock synchronization information includes at least the identifier of the clock source and the implementation of the third clock synchronization precision.
  • the wireless device and the wireless device controller will perform the following steps:
  • Step 301 the wireless device sends clock synchronization information to the wireless device controller.
  • the clock synchronization information includes an identifier of a clock source and an identifier of a source port.
  • the clock synchronization information further includes a second clock synchronization accuracy.
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source, and it can be understood that the clock synchronization information is information used to determine the clock synchronization accuracy between the wireless device and the clock source.
  • the clock source is a device that provides a clock reference reference for the clock link where the wireless device is located, and the clock reference reference is a final reference basis for clock synchronization or clock calibration. All devices (including transmission devices and wireless devices) on the clock link directly or indirectly use the system clock of the clock source as a reference for clock synchronization.
  • the clock link is the link between the clock source and the wireless device. Link for clock synchronization.
  • the identifier of the clock source is used to indicate a device that provides a clock reference for the clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the identifier of the clock source may be a grandmaster clock identity (grandmasterIdentity) in the precision time protocol (PTP).
  • the identifier of the source port is used to indicate an upper-level network device in the clock link that provides clock synchronization to the wireless device. It can also be understood that the upper-level network device of the wireless device is a network device directly connected to the wireless device, and the wireless device performs clock synchronization directly based on the upper-level network device.
  • the upper-level network device of the wireless device may be a transmission device connected to the wireless device, or may be a wireless device controller.
  • the source port identifier may be sourcePortIdentity in the precision time protocol (PTP).
  • the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device with respect to the upper-level network device of the wireless device, that is, the time (or phase) of the system clock of the wireless device is the same as that of the upper-level network device of the wireless device.
  • the second clock synchronization accuracy may be called local accuracy (Local Accuracy).
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the quantity information of the communication channel may be represented by adding one to the value of steps (stepsRemoved) in the precision time protocol (PTP).
  • the message sent by the wireless device to the wireless device controller may include, in addition to the aforementioned content, an identifier of the wireless device, and the identifier information of the wireless device is used to identify the wireless device, so that the wireless device controller
  • the wireless device can be distinguished from other wireless devices.
  • the wireless device may be identified by a clock identity (clockIdentity).
  • the identification of the clock source the identification of the source port, the identification of the wireless device, the synchronization accuracy of the second clock, and the number of communication channels, refer to the relevant introduction in step 201 above, and details are not repeated here.
  • a management message for example, a management message in the 1588 protocol
  • the format of the management message may be as shown in Table 1-1 below:
  • TLV type is used to indicate the type of the management message, and in this application, the TLV type is used to indicate that the management message is used to transmit clock synchronization information.
  • TLV length is used to indicate the byte length occupied by the TLV.
  • the format of the packet carrying the clock synchronization information may not be limited to the fields listed in the aforementioned Table 1-1.
  • Step 302 the wireless device controller judges whether the identifier of the clock source is the same as the identifier of the wireless device controller.
  • the wireless device controller needs to first know whether the clock source of the wireless device is the wireless device controller. Specifically, the wireless device controller determines whether the clock source of the wireless device is the wireless device controller by judging whether the identifier of the clock source is the same as the identifier of the wireless device controller.
  • the wireless device controller determines that the identifier of the clock source is the same as the identifier of the wireless device controller, it means that the clock source of the wireless device is the wireless device controller, indicating that the wireless device controller can determine that the wireless device is compatible with the clock synchronization information based on the clock synchronization information.
  • the clock synchronization accuracy between the wireless device controllers that is, the first clock synchronization accuracy. Then, the wireless device controller will execute step 303 .
  • step 303 the wireless device controller judges whether the identifier of the clock source is the same as the identifier of the source port.
  • the wireless device controller determines that the identifier of the clock source is the same as the identifier of the wireless device controller, that is, when the wireless device controller determines that the clock source of the wireless device is the wireless device controller, the wireless device The controller also needs to determine the topology of the clock link between the wireless device and the wireless device controller (that is, how many transmission devices and how many communication channels are between the wireless device and the wireless device controller), and How to calculate the first clock synchronization precision is decided based on the topology structure of the clock link.
  • the wireless device controller determines that the identifier of the clock source is the same as the identifier of the source port, the wireless device controller executes step 304a; when the wireless device controller determines that the identifier of the clock source is not the same as the identifier of the source port, the wireless device The controller executes step 304b.
  • Step 304a the wireless device controller determines that the second clock synchronization accuracy is the first clock synchronization accuracy.
  • the wireless device controller can determine that the wireless device and the The wireless device controller is directly connected, and the second clock synchronization accuracy carried in the clock synchronization information indicates the clock synchronization accuracy (ie, the first clock synchronization accuracy) of the wireless device relative to the wireless device controller. Therefore, the wireless device controller uses the value of the second clock synchronization precision in the clock synchronization information as the value of the first clock synchronization precision.
  • the wireless device sending clock synchronization information is wireless device 3
  • the wireless device controller receiving clock synchronization information is wireless device controller 1
  • the wireless device controller 1 receives
  • the identifier of the clock source is the identifier of the wireless device controller 1
  • the identifier of the source port received by the wireless device controller 1 is the identifier of the wireless device controller 1.
  • the clock synchronization information carries The clock synchronization accuracy of the wireless device 3 relative to the upper-level network device of the wireless device is 100 ns
  • the wireless device controller 1 determines that the clock synchronization accuracy of the wireless device 3 relative to the wireless device controller 1 is 100 ns.
  • Step 304b the wireless device controller determines the first clock synchronization accuracy according to the number of channels and the preset clock synchronization accuracy.
  • the identifier of the clock source is different from the identifier of the source port, which means that the upper-level network device of the wireless device is not the same device as the clock source, and the wireless device is connected to the clock source through at least one transmission device.
  • the foregoing at least one transmission device includes an upper-level network device of the foregoing wireless device.
  • the wireless device controller needs to determine the topology of the clock link between the wireless device and the wireless device controller in combination with the information on the number of communication channels, and then estimate the clock synchronization accuracy between the wireless device and the wireless device controller (ie first clock synchronization accuracy).
  • the quantity information of the communication channels can reflect how many levels of clock synchronization need to be experienced between the wireless device and the wireless device controller.
  • the wireless device controller can estimate the clock synchronization accuracy between two network devices connected by each communication channel (hereinafter referred to as clock synchronization accuracy at all levels), then the wireless device controller can estimate the synchronization accuracy of each level of clock synchronization The cumulative sum of is used as the clock synchronization accuracy between the wireless device and the wireless device controller (ie, the first clock synchronization accuracy).
  • the wireless device controller stores preset clock synchronization accuracy.
  • the preset clock synchronization precision may be a clock synchronization precision between two network devices predefined in a protocol or standard.
  • the preset clock synchronization accuracy may also be an empirical value artificially set in the wireless device controller, which represents a possible value of the clock synchronization accuracy between two network devices in the clock link.
  • the second clock synchronization accuracy can determine the wireless The clock synchronization accuracy of the device relative to the upper-level network device of the wireless device. Therefore, the wireless device controller can use the product obtained by multiplying the difference between the number information of the communication channel and 1 by the preset clock synchronization accuracy as The clock synchronization accuracy between the upper-level network device of the wireless device and the wireless device controller. Then, the wireless device controller calculates the sum of the aforementioned product and the second clock synchronization precision as the first clock synchronization precision.
  • the wireless device sending the clock synchronization information is wireless device 1
  • the wireless device controller receiving the clock synchronization information is wireless device controller 2
  • the identifier of the clock source carried in the clock synchronization information is The identifier of the wireless device controller 2
  • the identifier of the source port is the identifier of the transmission device 3
  • the value of the number of communication channels is 3.
  • the second clock synchronization accuracy that is, the clock synchronization accuracy of the wireless device 1 relative to the transmission device 3
  • Step 305 the wireless device controller sends the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device.
  • step 305 is an optional step.
  • the network management device is a device for managing and maintaining wireless devices and wireless device controllers, and the network management device is used to identify the clock topology of the entire network based on the obtained information, and then to control one or more wireless device controllers based on the aforementioned clock topology to manage.
  • the network management device can also manage transmission devices and wireless devices based on clock topology.
  • the wireless device controller may only send the clock synchronization information of the wireless device to the network management device, or may only send the first clock synchronization accuracy to the network management device, and may also combine the aforementioned clock synchronization information and the first clock synchronization accuracy are sent to the aforementioned network management device. Therefore, the network management device may determine the clock link between the aforementioned wireless device and the wireless device controller based on the aforementioned clock synchronization information. If the network management device receives the clock synchronization information of multiple wireless devices, the network management device can determine the clock topology formed by multiple clock links.
  • the network management device it is beneficial for the network management device to manage the transmission devices in the fronthaul network or the wireless devices and wireless device controllers linked through the aforementioned fronthaul network based on the aforementioned clock link (or clock topology), which is conducive to improving network device management of transmission devices, Management efficiency of wireless devices or wireless device controllers.
  • the wireless device can provide the wireless controller with the clock synchronization accuracy (that is, the second clock synchronization accuracy) of the wireless device relative to the upper-level network device of the wireless device through the clock synchronization information, and then the wireless device The controller can determine the clock synchronization accuracy of the wireless device relative to the wireless device controller (that is, the first clock synchronization accuracy) based on the second clock synchronization accuracy, so it is beneficial for the wireless device controller to determine the clock synchronization accuracy based on the first clock synchronization accuracy.
  • Manage wireless devices Furthermore, it is beneficial for the wireless device controller to accurately determine the clock synchronization precision between the two wireless devices. Furthermore, it is beneficial for the wireless device controller to decide whether the aforementioned two wireless devices run a certain service that requires coordinated operation.
  • the wireless device and the wireless device controller will perform the following steps:
  • Step 401 the wireless device sends clock synchronization information to the wireless device controller.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy.
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source, and it can be understood that the clock synchronization information is information used to determine the clock synchronization accuracy between the wireless device and the clock source.
  • the clock source is a device that provides a clock reference reference for the clock link where the wireless device is located, and the clock reference reference is a final reference basis for clock synchronization or clock calibration. All devices (including transmission devices and wireless devices) on the clock link directly or indirectly use the system clock of the clock source as a reference for clock synchronization.
  • the clock link is the link between the clock source and the wireless device. Link for clock synchronization.
  • the identifier of the clock source is used to indicate a device that provides a clock reference for the clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the identifier of the clock source may be a grandmaster clock identity (grandmasterIdentity) in the precision time protocol (PTP).
  • the wireless device can provide to the wireless device controller, that is, the third clock synchronization accuracy.
  • the clock source is a wireless device controller receiving the clock synchronization signal
  • the value of the third clock synchronization accuracy represents the clock synchronization accuracy of the wireless device relative to the wireless device controller (ie, the first clock synchronization accuracy).
  • the third clock synchronization accuracy may be called total accuracy (Total Accuracy).
  • the message sent by the wireless device to the wireless device controller may include, in addition to the aforementioned content, an identifier of the wireless device, and the identifier information of the wireless device is used to identify the wireless device, so that the wireless device controller
  • the wireless device can be distinguished from other wireless devices.
  • the wireless device may be identified by a clock identity (clockIdentity).
  • a management message for example, a management message in the 1588 protocol
  • the format of the management message may be as shown in Table 2-1 below:
  • Step 402 the wireless device controller judges whether the identifier of the clock source is the same as the identifier of the wireless device controller.
  • the wireless device controller needs to first know whether the clock source of the wireless device is the wireless device controller. Specifically, the wireless device controller determines whether the clock source of the wireless device is the wireless device controller by judging whether the identifier of the clock source is the same as the identifier of the wireless device controller.
  • the wireless device controller judges that the identifier of the clock source is the same as the identifier of the wireless device controller, it means that the clock source of the wireless device is the wireless device controller, indicating that the wireless device controller can determine that the wireless device is compatible with the clock synchronization information based on the clock synchronization information.
  • the clock synchronization accuracy between the wireless device controllers that is, the first clock synchronization accuracy. Then, the wireless device controller will execute step 403 .
  • Step 403 the wireless device controller determines that the third clock synchronization accuracy is the first clock synchronization accuracy.
  • the clock synchronization information since the identifier of the clock source is the same as the identifier of the wireless device controller, the clock synchronization information only carries the clock synchronization accuracy (that is, the third clock synchronization accuracy) of the wireless device relative to the clock source. Therefore, The wireless device controller may determine that the third clock synchronization accuracy carried in the clock synchronization information represents the clock synchronization accuracy (ie, the first clock synchronization accuracy) of the wireless device relative to the wireless device controller. Therefore, the wireless device controller uses the value of the third clock synchronization precision in the clock synchronization information as the value of the first clock synchronization precision.
  • the wireless device sending the clock synchronization information is wireless device 1
  • the wireless device controller receiving the clock synchronization information is wireless device controller 2
  • the identifier of the clock source carried in the clock synchronization information is The ID of the wireless device controller 2. If the third clock synchronization accuracy (that is, the clock synchronization accuracy of the wireless device 1 relative to the wireless device controller 2 ) is 130 ns, then the wireless device controller can determine that the first clock synchronization accuracy is 130 ns.
  • Step 404 the wireless device controller sends the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device.
  • step 404 is similar to step 305 in the foregoing embodiment corresponding to FIG. 3 , and for details, please refer to relevant descriptions in foregoing step 305 .
  • the wireless device can directly provide the wireless controller with the clock synchronization accuracy of the wireless device relative to the clock source (that is, the third clock synchronization accuracy), when the clock source is the wireless device controller receiving the clock synchronization information
  • the wireless device controller can directly determine the clock synchronization accuracy of the wireless device relative to the wireless device controller (ie, the first clock synchronization accuracy) based on the third clock synchronization accuracy. Therefore, it is beneficial for the wireless device controller to manage the wireless device based on the first clock synchronization accuracy. Furthermore, it is beneficial for the wireless device controller to accurately determine the clock synchronization precision between the two wireless devices. Furthermore, it is beneficial for the wireless device controller to decide whether the aforementioned two wireless devices run a certain service that requires coordinated operation.
  • FIG. 5 it is a schematic structural diagram of a communication device 50 provided in this application.
  • the communication device 50 may be a network element or device with a baseband signal processing function, or a device for managing wireless signal processing of the access network RAN.
  • the communication apparatus 50 may be a base band processing unit (base band unit, BBU) (also called an indoor base band processing unit (building base band unite, BBU)) in an access network device (for example, a base station) .
  • BBU base band processing unit
  • BBU also called an indoor base band processing unit (building base band unite, BBU)
  • an access network device for example, a base station
  • the communication device 50 may be a baseband processing unit BBU in an evolved base station (evolutional node B, eNB or e-NodeB) .
  • the communication device 50 may be a baseband processing unit BBU in a next generation node B (next generation node B, gNB).
  • the communication device 50 may also be a centralized unit (centralized unit, CU) in the cloud access network (CloudRAN) system, or a distributed unit (distributed unit, DU), It can also be a combined structure of centralized unit CU and distributed unit DU.
  • the communication device 50 may also be other network elements or devices with a baseband signal processing function, or other devices with wireless signal processing for managing the access network RAN.
  • the communication device 50 includes at least one processor 501 , at least one memory 502 and at least one communication interface 503 .
  • the processor 501, memory 502 and communication interface 503 are connected through connection means.
  • the foregoing connection device may include various types of interfaces, transmission lines or buses, etc., which are not limited in this embodiment.
  • the memory 502 is mainly used for storing software programs and data.
  • the memory 502 may exist independently and be connected to the processor 501 .
  • the memory 502 may be integrated with the processor 501, for example, integrated into one or more chips.
  • the memory 502 can store program codes for executing the technical solutions of the embodiments of the present application, and the execution is controlled by the processor 501 , and various types of computer program codes to be executed can also be regarded as drivers for the processor 501 .
  • FIG. 5 in this embodiment only shows one memory and one processor.
  • the communication device 50 may have multiple processors or multiple memories, which are not specifically described here. limited.
  • the memory 502 may also be called a storage medium or a storage device.
  • the memory 502 may be a storage element on the same chip as the processor (that is, an on-chip storage element), or an independent storage element, which is not limited in this embodiment of the present application.
  • the communication interface 503 is used to receive a digital baseband signal or a digital intermediate frequency signal from a radio frequency unit (for example, the wireless device introduced above), and provide the digital baseband signal or digital intermediate frequency signal to the processor 501, so that The processor 501 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing.
  • the communication interface 503 can also send a digital baseband signal or a digital intermediate frequency signal to the radio frequency unit (for example, the wireless device introduced above), so that the radio frequency unit converts the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and The radio frequency signal is transmitted through one or more antennas.
  • the communication interface 503 includes an enhanced common public radio interface (enhanced common public radio interface, eCPRI), and the communication device 50 can send a message carrying clock synchronization information through the eCPRI, for example, the 1588 management message introduced above .
  • eCPRI enhanced common public radio interface
  • the communication interface 503 is also connected with an optical module (not shown in the figure), and the optical module is used to convert the digital baseband signal generated by the communication device 50 into an optical signal for transmission through an optical fiber.
  • the optical module is also used to receive optical signals from other devices (for example, the transmission device or wireless device introduced above), and convert the aforementioned optical signals into digital baseband signals.
  • the combined structure of the aforementioned communication interface 503 and the optical module may also be referred to as a transceiver unit, a transceiver, a transceiver device, and the like.
  • the device used to realize the receiving function in the transceiver unit can be regarded as a receiving unit
  • the device used to realize the sending function in the transceiver unit can be regarded as a sending unit, that is, the transceiver unit includes a receiving unit and a sending unit, and the receiving unit also It can be called receiver, input port, receiving circuit, etc.
  • the sending unit can be called transmitter, transmitter, or transmitting circuit, etc.
  • the aforementioned processor 501 is mainly used to process communication protocols and communication data, control the entire network equipment, execute software programs, and process data of software programs, for example, to support the communication device 50 to execute the described action.
  • the communication device 50 may include a baseband processor and a central processing unit, wherein the baseband processor is mainly used for processing communication protocols and communication data, and the central processing unit is mainly used for controlling the entire communication device 50, executing software programs, and processing software Program data.
  • the processor 501 shown in FIG. 5 can integrate the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors, interconnected through technologies such as a bus.
  • the communication device 50 may include multiple baseband processors to adapt to different network standards, the communication device 50 may include multiple central processors to enhance its processing capability, and each component of the communication device 50 may be configured through various bus connection.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the communication device 50 will execute the following steps based on the program code stored in the memory 502:
  • the processor 501 receives clock synchronization information from the wireless device through the communication interface 503, where the clock synchronization information is used to indicate a clock synchronization accuracy between the wireless device and a clock source. Then, the processor 501 determines a first clock synchronization accuracy according to the clock synchronization information, where the first clock synchronization accuracy is a clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock synchronization accuracy refers to the fluctuation range of the difference between the time (or phase) of the measured clock and the time (or phase) of the reference clock. Generally, it can be represented by the time (or phase) error mean value of the clock under test and the reference clock within a period of test measurement.
  • the clock synchronization accuracy refers to the fluctuation range of the time or phase difference between a wireless device and a certain transmission device or a certain wireless device controller. It should be noted that in some embodiments, the foregoing clock synchronization accuracy may also be referred to as synchronization accuracy or time synchronization accuracy.
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source. It can be understood that the clock synchronization information is information used to determine the clock synchronization accuracy between the wireless device and the clock source.
  • the wireless device The controller can determine the clock synchronization accuracy between the wireless device and the clock source based on the aforementioned clock synchronization information.
  • the clock source is a network device that provides a clock reference for a clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the clock reference is the final reference basis for clock synchronization or clock calibration.
  • the wireless device controller cannot know which clock synchronization link the wireless device is based on, nor can it know which clock source is on the clock link for clock synchronization of the wireless device Internet equipment. Therefore, the wireless device controller cannot know the clock synchronization accuracy of the wireless device relative to the wireless device controller, and further, the wireless device controller cannot manage some services of the wireless device based on the clock synchronization accuracy.
  • the wireless device controller can then determine the relative The clock synchronization accuracy of the wireless device controller (ie, the first clock synchronization accuracy) is therefore beneficial for the wireless device controller to manage the wireless device based on the first clock synchronization accuracy. Furthermore, it is beneficial for the wireless device controller to accurately determine the clock synchronization precision between the two wireless devices. Furthermore, it is beneficial for the wireless device controller to decide whether the aforementioned two wireless devices run a certain service that requires coordinated operation.
  • the wireless device may be connected to the wireless device controller through at least one clock information transmission device, or the wireless device may be directly connected to the wireless device controller.
  • the clock information transmission device refers to a device for transmitting information related to clock synchronization (hereinafter referred to as clock information), and the clock information may include part or all of the aforementioned clock synchronization information.
  • the aforementioned at least one clock information transmission device is connected through an optical fiber.
  • the clock synchronization information is carried in the management message.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the processor 501 may also send the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device through the communication interface 503 .
  • the clock synchronization information includes an identifier of the clock source and an identifier of the source port.
  • the identifier of the source port is used to indicate an upper-level network device in the clock link that provides clock synchronization to the wireless device.
  • the identifier of the clock source is used to indicate the network device that provides the clock reference for the clock link where the wireless device is located.
  • the clock source is a network device that provides a clock reference reference for the clock link where the wireless device is located, and the clock reference reference is the final reference basis for clock synchronization or clock calibration. All devices (including transmission devices and wireless devices) on the clock link directly or indirectly use the system clock of the clock source as a reference for clock synchronization.
  • the clock link is a link between the clock source and the wireless device for clock synchronization.
  • the clock source in the clock synchronization information sent by the wireless device to the communication device 50 may be the communication device 50 receiving the aforementioned clock synchronization information.
  • the wireless device and the communication device 50 are located on the same clock synchronization link It may also be a wireless device controller on another clock link.
  • the wireless device may be clock-synchronized through another clock link, and this clock link does not include the aforementioned communication device that receives clock synchronization information 50; it may also be a network device on other links or topologies that can provide a clock as a reference reference, which is not specifically limited here.
  • the identifier of the source port is used to indicate an upper-level network device that provides clock synchronization to the wireless device in the clock link, wherein the upper-level network device is a network device directly connected to the wireless device, and, The wireless device performs clock synchronization directly based on the network device.
  • the upper-level network device may be a transmission device connected to the wireless device, or may be a wireless device controller.
  • the clock synchronization information further includes a second clock synchronization accuracy, where the second clock synchronization accuracy is a clock synchronization accuracy of the wireless device with respect to the upper-level network device of the wireless device.
  • the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the upper-level network device, that is, the time (or phase) of the system clock of the wireless device and the time of the system clock of the upper-level network device (or phase) fluctuation range of the difference between.
  • the second clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the transmission device; if the upper-level network device If it is a wireless device controller directly connected to the wireless device, the second clock synchronization accuracy is a clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the identifier of the wireless device is used to specify the identity of the wireless device that sends the clock synchronization information to the controller of the wireless device, so that the communication device 50 can determine which wireless device the clock synchronization information comes from based on the identifier of the wireless device.
  • the identification of the wireless devices can make the wireless device sending clock synchronization information different from other wireless devices.
  • the processor 501 is configured to determine that the second clock synchronization accuracy is the second clock synchronization accuracy when the identifier of the clock source is the same as the identifier of the communication device 50, and the identifier of the clock source is the same as the identifier of the source port. A clock synchronization accuracy.
  • the identification of the clock source is the same as the identification of the communication device 50, and the identification of the clock source is the same as the identification of the source port, therefore, the communication device 50 can determine that the wireless device is directly connected to the communication device 50 , that is, the wireless device directly performs clock synchronization based on the clock source. Further, the communication device 50 can determine that the second clock synchronization accuracy carried in the clock synchronization information indicates the clock synchronization accuracy of the wireless device relative to the communication device 50 (ie, the first clock synchronization accuracy). Therefore, the communication device 50 uses the value of the second clock synchronization precision in the clock synchronization information as the value of the first clock synchronization precision.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the clock information refers to information related to clock synchronization, and the content of the clock information may include part or all of the content of the aforementioned clock synchronization information.
  • the processor 501 is configured to, when the identifier of the clock source is the same as the identifier of the wireless device controller, and the identifier of the clock source is different from the identifier of the source port, according to the quantity information of the communication channel, The second clock synchronization accuracy and the preset clock synchronization accuracy determine the first clock synchronization accuracy.
  • the processor 501 is specifically configured to determine a product obtained by multiplying the difference between the number of communication channels and 1 by a preset clock synchronization precision; then, determine the sum of the product and the second clock synchronization precision as the First clock synchronization accuracy.
  • the preset clock synchronization accuracy may be the clock synchronization accuracy between two network devices predefined in the protocol or standard, or it may be an empirical value artificially set in the wireless device controller, indicating that the two network devices in the clock link Possible values for the precision of clock synchronization between network devices. It should be understood that, in addition to estimating the clock synchronization accuracy between two transmission devices, the preset clock synchronization accuracy can also be used to estimate the relationship between the transmission device and the wireless device controller directly connected to the transmission device. Clock synchronization accuracy.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy, where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the processor 501 is configured to determine that the third clock synchronization precision is the first clock synchronization precision when the identifier of the clock source is the same as the identifier of the wireless device controller.
  • the processor 501 is further configured to send the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device.
  • the wireless device includes a first wireless device and a second wireless device
  • the processor 501 determines a fourth clock synchronization precision according to the clock synchronization information received from the first wireless device, and the processor 501 determines a fifth clock synchronization precision according to the clock synchronization information received from the second wireless device.
  • the fourth clock synchronization accuracy is the clock synchronization accuracy between the first wireless device and the communication device 50
  • the fifth clock synchronization accuracy is the clock synchronization accuracy between the second wireless device and the communication device 50 .
  • the processor 501 is further configured to determine a sixth clock synchronization accuracy according to the fourth clock synchronization accuracy and the fifth clock synchronization accuracy, where the sixth clock synchronization accuracy is the distance between the first wireless device and the second wireless device Clock synchronization accuracy.
  • the processor 501 is further configured to determine whether to allow the first wireless device to cooperate with the second wireless device to run a first service according to the sixth clock synchronization accuracy, and the first service requires two or more wireless devices to perform coordinated operation Business.
  • the first service may be a service involving MIMO technology, or a service involving carrier aggregation (CA).
  • the processor 501 is specifically configured to calculate a sum of the fourth clock synchronization accuracy and the fifth clock synchronization accuracy to obtain the sixth clock synchronization accuracy.
  • the processor 501 is specifically configured to:
  • the present application also provides another communication device 60, which may be the wireless device controller or the chip in the wireless device controller in the embodiment corresponding to Figure 2, Figure 3 or Figure 4 .
  • the communication device 60 includes: a transceiver module 601 and a processing module 602 .
  • the transceiver module 601 is configured to receive clock synchronization information from a wireless device, where the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and a clock source.
  • the processing module 602 is configured to determine a first clock synchronization accuracy according to the clock synchronization information, where the first clock synchronization accuracy is a clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock source is a network device that provides a clock reference for a clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the clock reference is the final reference basis for clock synchronization or clock calibration.
  • the wireless device is connected to the wireless device controller through at least one clock information transmission device.
  • the clock synchronization information is carried in the management message.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the transceiver module 601 is further configured to send the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device.
  • the clock synchronization information includes an identifier of the clock source, an identifier of a source port, and a second clock synchronization precision; the identifier of the source port is used to indicate that the wireless device is provided with a clock in the clock link A synchronized upper-level network device; the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the wireless device's upper-level network device.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the processing module 602 is configured to determine that the second clock synchronization precision is the First clock synchronization accuracy.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the processing module 602 is configured to: when the identifier of the clock source is the same as the identifier of the wireless device controller, and the identifier of the clock source is different from the identifier of the source port, according to the number information of the communication channel, The second clock synchronization accuracy and the preset clock synchronization accuracy determine the first clock synchronization accuracy.
  • processing module 602 is configured to: determine the product obtained by multiplying the difference between the number of communication channels and 1 by the preset clock synchronization accuracy; the wireless device controller determines the product and the second clock synchronization accuracy and is the first clock synchronization accuracy.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy; where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the processing module 602 is configured to determine that the third clock synchronization precision is the first clock synchronization precision when the identifier of the clock source is the same as the identifier of the wireless device controller.
  • the processing module 602 is further configured to send the clock synchronization information and/or the first clock synchronization accuracy of the wireless device to the network management device.
  • the wireless device includes a first wireless device and a second wireless device
  • the processing module 602 determines a fourth clock synchronization precision according to the clock synchronization information received from the first wireless device, and the processing module 602 determines a fifth clock synchronization precision according to the clock synchronization information received from the second wireless device.
  • the fourth clock synchronization accuracy is the clock synchronization accuracy between the first wireless device and the communication device 60
  • the fifth clock synchronization accuracy is the clock synchronization accuracy between the second wireless device and the communication device 60 .
  • the processing module 602 is further configured to determine a sixth clock synchronization accuracy according to the fourth clock synchronization accuracy and the fifth clock synchronization accuracy, where the sixth clock synchronization accuracy is the distance between the first wireless device and the second wireless device Clock synchronization accuracy.
  • the processing module 602 is further configured to determine whether to allow the first wireless device to cooperate with the second wireless device to run a first service according to the sixth clock synchronization accuracy, and the first service requires two or more wireless devices to perform coordinated operation Business.
  • the processing module 602 is specifically configured to calculate a sum of the fourth clock synchronization accuracy and the fifth clock synchronization accuracy to obtain the sixth clock synchronization accuracy.
  • processing module 602 is specifically configured to:
  • FIG. 7 it is a schematic structural diagram of another communication device 70 provided in this application.
  • the wireless device in the method embodiment corresponding to FIG. 2 , FIG. 3 or FIG. 4 may be based on the structure of the communication apparatus 70 shown in FIG. 7 in this embodiment.
  • the foregoing communication device 70 may be a radio unit (radio unit, RU) (also referred to as a radio frequency unit) in an access network RAN device (for example, a base station), or may be another device capable of processing wireless signals (for example, a , intermediate frequency signal, radio frequency signal, etc.) function processing device.
  • RU radio unit
  • RAN device for example, a base station
  • wireless signals for example, a , intermediate frequency signal, radio frequency signal, etc.
  • the communication device 70 may be a remote radio unit (remote radio unit, RRU) (also referred to as a remote radio unit) or a remote radio head (remote radio head, RRH) in the base station.
  • RRU remote radio unit
  • RRH remote radio head
  • the RRU is generally used for the conventional outdoor coverage of the macro station
  • the RRH is generally used for the indoor coverage of the indoor distribution system.
  • the communication device 70 may also be an active antenna processing unit (active antenna unit, AAU), that is, a processing unit integrated with an RRU (or RRH) and an antenna.
  • AAU active antenna processing unit
  • the wireless device may also be other devices or devices capable of transmitting and receiving radio frequency signals and processing radio frequency signals or intermediate frequency signals.
  • the communication device 70 includes at least one processor 701 , at least one memory 702 , at least one transceiver 703 and one or more antennas 704 .
  • the processor 701 , the memory 702 and the transceiver 703 are connected through a connecting device, and the antenna 704 is connected to the transceiver 703 .
  • the foregoing connection device may include various types of interfaces, transmission lines or buses, etc., which are not limited in this embodiment.
  • the memory 702 is mainly used for storing software programs and data.
  • the memory 702 may exist independently and be connected to the processor 701 .
  • the memory 702 may be integrated with the processor 701, for example, integrated into one or more chips.
  • the memory 702 can store program codes for executing the technical solutions of the embodiments of the present application, and the execution is controlled by the processor 701 , and various types of computer program codes to be executed can also be regarded as drivers for the processor 701 .
  • FIG. 7 in this embodiment only shows one memory and one processor.
  • the communication device 70 may have multiple processors or multiple memories, which are not specifically described here. limited.
  • the memory 702 may also be called a storage medium or a storage device.
  • the memory 702 may be a storage element on the same chip as the processor (that is, an on-chip storage element), or an independent storage element, which is not limited in this embodiment of the present application.
  • the transceiver 703 can be used to support the receiving or sending of radio frequency signals between the communication device 70 and the terminal equipment, and the transceiver 703 can be connected to the antenna 704 .
  • the transceiver 703 includes a transmitter Tx and a receiver Rx.
  • one or more antennas 704 can receive radio frequency signals
  • the receiver Rx of the transceiver 703 is used to receive the radio frequency signals from the antennas 704, and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, so that the The aforementioned digital baseband signal or digital intermediate frequency signal is transmitted to the wireless device controller, so that the wireless device controller can further process the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing.
  • the transmitter Tx in the transceiver 703 is also used to receive the modulated digital baseband signal or digital intermediate frequency signal from the wireless device controller, convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass One or more antennas 704 transmit the radio frequency signals.
  • the receiver Rx can selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal.
  • the sequence of the aforementioned down-mixing processing and analog-to-digital conversion processing The order is adjustable.
  • the transmitter Tx can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal.
  • the up-mixing processing and digital-to-analog conversion processing The order of priority is adjustable.
  • Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.
  • transceiver 703 may also be referred to as a transceiver unit, a transceiver, a transceiver device, and the like.
  • the device used to realize the receiving function in the transceiver unit can be regarded as a receiving unit
  • the device used to realize the sending function in the transceiver unit can be regarded as a sending unit, that is, the transceiver unit includes a receiving unit and a sending unit, and the receiving unit also It can be called receiver, input port, receiving circuit, etc., and the sending unit can be called transmitter, transmitter, or transmitting circuit, etc.
  • the foregoing processor 701 is mainly used to process communication protocols (for example, clock synchronization protocols, etc.) and communication data, execute software programs, and process data of software programs, for example, to support the communication device 70 to execute the described action.
  • the communication device 70 is configured to execute the method in the foregoing embodiment corresponding to FIG. 2 , FIG. 3 or FIG. 4 .
  • the communication device 70 will send clock synchronization information to the wireless device controller through the transceiver 703, the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source, and the clock synchronization information is used to determine the first A clock synchronization accuracy, the first clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the wireless device controller.
  • the clock synchronization accuracy refers to the fluctuation range of the difference between the time (or phase) of the measured clock and the time (or phase) of the reference clock. Generally, it can be represented by the time (or phase) error mean value of the clock under test and the reference clock within a period of test measurement.
  • the clock synchronization accuracy refers to the fluctuation range of the time or phase difference between a wireless device and a certain transmission device or a certain wireless device controller. It should be noted that in some embodiments, the foregoing clock synchronization accuracy may also be referred to as synchronization accuracy or time synchronization accuracy.
  • the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and the clock source. It can be understood that the clock synchronization information is information used to determine the clock synchronization accuracy between the wireless device and the clock source.
  • the wireless device The controller can determine the clock synchronization accuracy between the wireless device and the clock source based on the aforementioned clock synchronization information.
  • the clock source is a network device that provides a clock reference for a clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the clock reference is the final reference basis for clock synchronization or clock calibration.
  • the wireless device is connected to the wireless device controller through at least one clock information transmission device.
  • the clock synchronization information is carried in the management message.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the clock synchronization information includes an identifier of the clock source, an identifier of a source port, and a second clock synchronization accuracy; where the identifier of the source port is used to indicate that the wireless device in the clock link
  • An upper-level network device that provides clock synchronization; the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the upper-level network device of the wireless device.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected network devices capable of transmitting clock information.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy; where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • the present application also provides another communication device 80 .
  • the communication device 80 may be the wireless device or the chip in the wireless device in the embodiment corresponding to FIG. 2 , FIG. 3 or FIG. 4 .
  • the communication device 80 includes: a processing module 801 and a transceiver module 802 .
  • the processing module 801 is configured to generate clock synchronization information, where the clock synchronization information is used to indicate the clock synchronization accuracy between the wireless device and a clock source.
  • the transceiver module 802 is configured to send clock synchronization information to the wireless device controller, where the clock synchronization information is used to determine a first clock synchronization accuracy, where the first clock synchronization accuracy is the clock synchronization accuracy between the wireless device and the wireless device controller .
  • the clock source is a network device that provides a clock reference for a clock link where the wireless device is located, and the clock link is a link for clock synchronization between the clock source and the wireless device.
  • the clock reference is the final reference basis for clock synchronization or clock calibration.
  • the wireless device is connected to the wireless device controller through at least one clock information transmission device.
  • the clock synchronization information is carried in the management message.
  • the clock synchronization information is transmitted to the wireless device controller in a unicast manner.
  • the clock synchronization information includes an identifier of the clock source, an identifier of a source port, and a second clock synchronization accuracy; where the identifier of the source port is used to indicate that the wireless device in the clock link
  • An upper-level network device that provides clock synchronization; the second clock synchronization accuracy is the clock synchronization accuracy of the wireless device relative to the upper-level network device of the wireless device.
  • the clock synchronization information also includes an identifier of the wireless device.
  • the clock synchronization information further includes information about the number of communication channels on the clock link, where the communication channel refers to a path between two directly connected transmission devices capable of transmitting clock information.
  • the clock synchronization information includes an identifier of a clock source and a third clock synchronization accuracy; where the third clock synchronization accuracy is a clock synchronization accuracy of the wireless device relative to the clock source.
  • each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here. It should also be understood that the first, second, third, fourth and various numbers mentioned herein are only for convenience of description, and are not used to limit the scope of the embodiments of the present application.
  • the present application provides a computer program product comprising one or more computer instructions.
  • the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • implement the method related to the wireless device controller in FIG. 2 , FIG. 3 or FIG. 4 For another example, implement the method related to the wireless device as shown in FIG. 2 , FIG. 3 or FIG. 4 .
  • the computer can be a general purpose computer, special purpose computer, computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g.
  • the computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium, (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital versatile disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD)) wait.
  • the present application also provides a computer-readable storage medium, the storage medium stores a computer program, and the computer program is executed by a processor to implement the wireless device controller as described above in FIG. 2 , FIG. 3 or FIG. 4 . method.
  • the present application also provides a computer-readable storage medium, the storage medium stores a computer program, and the computer program is executed by a processor to implement the method related to the wireless device in FIG. 2 , FIG. 3 or FIG. 4 .
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application.
  • the implementation process constitutes any limitation.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé permettant d'obtenir (ou de fournir) des informations de synchronisation d'horloge et un dispositif de communication, qui sont appliqués à un réseau de communication entre une unité de commande de dispositif sans fil et un dispositif sans fil. Le dispositif sans fil peut, au moyen des informations de synchronisation d'horloge, fournir à l'unité de commande du dispositif sans fil la précision de synchronisation d'horloge du dispositif sans fil par rapport à une source d'horloge et, à son tour, d'après les informations de synchronisation d'horloge, l'unité de commande du dispositif sans fil peut déterminer la précision de synchronisation d'horloge (à savoir une première précision de synchronisation d'horloge) du dispositif sans fil par rapport à l'unité de commande du dispositif sans fil. Par conséquent, le dispositif de commande de dispositif sans fil peut gérer le dispositif sans fil d'après la première précision de synchronisation d'horloge.
PCT/CN2022/139228 2021-12-28 2022-12-15 Procédé d'obtention (ou de fourniture) d'informations de synchronisation d'horloge et dispositif de communication WO2023125033A1 (fr)

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CN114501604A (zh) * 2021-12-28 2022-05-13 华为技术有限公司 获取（或提供）时钟同步信息的方法以及通信装置

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CN110784275A (zh) * 2018-07-29 2020-02-11 华为技术有限公司 时间同步偏差调整方法、装置、终端以及接入层设备
CN113141648A (zh) * 2020-01-17 2021-07-20 大唐移动通信设备有限公司 一种定时信息上报方法、终端和网络侧设备
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